Electrical appliance.



T. DEADERICK.

ELECTRICAL APPLIANCE.

APPLICATION FILED rum, 1912.

1,052,044. Patented Feb.4,1913.

en e 7 ,i 9 I 2 WITNESSES A/Iomey THOMAS DEADERICK, OF NASHVILLE, TENNESSEE.

ELECTRICAL APPLIANCE. Y

Specication of Letters Patent.

Patented Feb. 4, 1913.

Application led February 27, 1912. Serial No. 630,366.

T 0 all whom it may con-cern.'

Be it known that I, THOMAS DEADERICK, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Electrical Appliances, which the following is a specification.

My invention relates t0 improvements in electrical appliances, and refers particularly to a device for preventing the surreptitious removal of the lamp or bulb from the socket of an electric light.

The leading object of the invention is to provide a lockinglmeanswhich will effectually prevent the unauthorized removal of an incandescent lamp bulb from its socket, and which will at the same time permit the proper person to remove the bulbY from 'its socket quickly and easily. i

Another object of the invention is to provide a locking arrangement which may be applied to either an inside split screw shell or upon a loose or revolving inside screw shell. A further object of the invention is to provide a locking arrangement for bulbs which will be simple in construction'and can be employed upon all typesof sockets in general use today without necessitatingmaterially changing the type of socket or providing a special socket, and which will possess merit in point of inexpensiveness and practicability to commend itself to all persons desiring an eliicient lock of the character stated.

To attain-the desired objects, the invention broadly stated, consists in the provision of a socket and shell embodying novel features of construction and combination of parts for service, substantially as disclosed herein.

In order that the detailed construction and o eration of my improvementmay be clearly understood and its many advantages fully appreciated, I have illustrated in the accompanying drawing a socket and lock constructed in accordance with and embodyin my invention. c

*igure l is a side elevation f the coInplete socket, lockand lamp. Fig. 2 is a vertical sectional view of the complete invention, taken at right angles to the view shownJ 'in Fig. 1. Fig. 3 is a detail view of the split collar or shell forming an important Ap art of the invention. Fig. .4 is a detail reference denote corresponding parts in theseveral views the numeral 1 deslgnates a portion of a tubular rod or fixture, through which the conducting wires 2 are passed, to the Contact plates 3, of the socket 4, having its upper end threaded at 5 to engage the corresponding threads 6, of the rod 1, or the threads of an insulating bushing, when a lamp cord is used.

`The numeral 7 designates an insulating i filler or block, inclosed in the socket, and provided with a key passage 9 and a key guide 10, through which a key 11 is passed to engage the slotted head 12 of the threaded screw 13, passing through the alining openings of the ears 14 and 15, formed upon the screw shell 16 of the lamp socket 4. A small screw 17 is employed to retain the key guide in place within the insulating filler 7 To prevent current from passing to the key 11, I may either insulate the head of the screw fromthe screw itself, as at 18, or l may secure fiber or other insulating material 18, upon the ears 14 and l5 of the shell. To prevent picking of the lock by improper persons, the headf12 of the screw may be slotted, squared, triangular, hexagonal, or in fact recessed or projected in any manner desired, while the key and key passage and guide-may be formed of a shape to correspond with the head.

To prevent the head of the screw from becoming removed from the ears 14 and 15, the outer ear 14 is unthreaded anc?. the ear 15 is threaded, while a recess or seat 19 is formed in the filler 7, to receive the screw head and permit it to turn freely.

The shell on collar 16 is split along one side as at 20, and is threaded to engage the threads of the lamp shell 21 of the lamp 22, provided with the usual contact member 23, adapted to make contact with the contact screw 24 of the socket shell 16. To insure the proper binding action of the shell 16, when the bulb is to be locked, the screw 13 the locking key.

through said ears, operating means for said tension device, and means` carried by said tension device and adapted to distend the ears when the lamp is to be unlocked.

14. In combination Wit-h a socket .and

lamp, a clamping member carried by thesocket, upstanding ears formed upon the member, akey passagelformed in the socket, a tension device passing transversely through the ears, av key passing through the key passage and engaging the tension device, and a spring member carried by the tension de-l vice intermediate the ears for distending the ears When it is desired to unlock the. lamp from the clamping member.

15. In a locking device, the combination with a lamp and a socket, of a locking member contained entirely Within the socket and completely encircling theshell for locking the lamp and shell.

In testimony whereof I aHiX my signature in presence of two Witnesses. v

THOMAS DEADERICK. Nitnessesz S. V. DEADERICK, D. S. HART. 

